/Engine/Source/Editor/UnrealEd/Public/Subsystems/EditorAssetSubsystem.h
Save the packages the assets live in. All objects that live in the packages will be saved. Will try to checkout the files.
True if the operation succeeds.
bool SaveLoadedAssets ( const [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & AssetsToSave, bool bOnlyIfIsDirty )